Module: wine Branch: master Commit: a938f693606faa0ca569cce9cbbee60b56eb8301 URL: http://source.winehq.org/git/wine.git/?a=commit;h=a938f693606faa0ca569cce9cb...
Author: Maarten Lankhorst maarten@codeweavers.com Date: Wed Nov 7 20:32:09 2007 +0100
dsound: Add mixing and normalization functions.
---
dlls/dsound/dsound_convert.c | 132 ++++++++++++++++++++++++++++++++++++++++++ dlls/dsound/dsound_private.h | 4 + 2 files changed, 136 insertions(+), 0 deletions(-)
diff --git a/dlls/dsound/dsound_convert.c b/dlls/dsound/dsound_convert.c index 6290a07..649bd78 100644 --- a/dlls/dsound/dsound_convert.c +++ b/dlls/dsound/dsound_convert.c @@ -182,3 +182,135 @@ const bitsconvertfunc convertbpp[4][4] = { { convert_24_to_8, convert_24_to_16, convert_24_to_24, convert_24_to_32 }, { convert_32_to_8, convert_32_to_16, convert_32_to_24, convert_32_to_32 }, }; + +static void mix8(int8_t *src, int32_t *dst, unsigned len) +{ + TRACE("%p - %p %d\n", src, dst, len); + while (len--) + /* 8-bit WAV is unsigned, it's here converted to signed, normalize function will convert it back again */ + *(dst++) += (int8_t)((uint8_t)*(src++) - (uint8_t)0x80); +} + +static void mix16(int16_t *src, int32_t *dst, unsigned len) +{ + TRACE("%p - %p %d\n", src, dst, len); + len /= 2; + while (len--) + { + *dst += le16(*src); + ++dst; ++src; + } +} + +static void mix24(int24_struct *src, int32_t *dst, unsigned len) +{ + TRACE("%p - %p %d\n", src, dst, len); + len /= 3; + while (len--) + { + uint32_t field; + field = ((unsigned)src->byte[2] << 16) + ((unsigned)src->byte[1] << 8) + (unsigned)src->byte[0]; + if (src->byte[2] & 0x80) + field |= 0xFF000000U; + *(dst++) += field; + ++src; + } +} + +static void mix32(int32_t *src, int64_t *dst, unsigned len) +{ + TRACE("%p - %p %d\n", src, dst, len); + len /= 4; + while (len--) + *(dst++) += le32(*(src++)); +} + +const mixfunc mixfunctions[4] = { + (mixfunc)mix8, + (mixfunc)mix16, + (mixfunc)mix24, + (mixfunc)mix32 +}; + +static void norm8(int32_t *src, int8_t *dst, unsigned len) +{ + TRACE("%p - %p %d\n", src, dst, len); + while (len--) + { + *dst = (*src) + 0x80; + if (*src < -0x80) + *dst = 0; + else if (*src > 0x7f) + *dst = 0xff; + ++dst; + ++src; + } +} + +static void norm16(int32_t *src, int16_t *dst, unsigned len) +{ + TRACE("%p - %p %d\n", src, dst, len); + len /= 2; + while (len--) + { + *dst = le16(*src); + if (*src <= -0x8000) + *dst = le16(0x8000); + else if (*src > 0x7fff) + *dst = le16(0x7fff); + ++dst; + ++src; + } +} + +static void norm24(int32_t *src, int24_struct *dst, unsigned len) +{ + TRACE("%p - %p %d\n", src, dst, len); + len /= 3; + while (len--) + { + if (*src <= -0x800000) + { + dst->byte[0] = 0; + dst->byte[1] = 0; + dst->byte[2] = 0x80; + } + else if (*src > 0x7fffff) + { + dst->byte[0] = 0xff; + dst->byte[1] = 0xff; + dst->byte[2] = 0x7f; + } + else + { + dst->byte[0] = *src; + dst->byte[1] = *src >> 8; + dst->byte[2] = *src >> 16; + } + ++dst; + ++src; + } +} + +static void norm32(int64_t *src, int32_t *dst, unsigned len) +{ + TRACE("%p - %p %d\n", src, dst, len); + len /= 4; + while (len--) + { + *dst = le32(*src); + if (*src <= -(int64_t)0x80000000) + *dst = le32(0x80000000); + else if (*src > 0x7fffffff) + *dst = le32(0x7fffffff); + ++dst; + ++src; + } +} + +const normfunc normfunctions[4] = { + (normfunc)norm8, + (normfunc)norm16, + (normfunc)norm24, + (normfunc)norm32, +}; diff --git a/dlls/dsound/dsound_private.h b/dlls/dsound/dsound_private.h index 21fcfe2..fbddefe 100644 --- a/dlls/dsound/dsound_private.h +++ b/dlls/dsound/dsound_private.h @@ -72,6 +72,10 @@ typedef struct DirectSoundCaptureDevice DirectSoundCaptureDevice; /* dsound_convert.h */ typedef void (*bitsconvertfunc)(const void *, void *); extern const bitsconvertfunc convertbpp[4][4]; +typedef void (*mixfunc)(const void *, void *, unsigned); +extern const mixfunc mixfunctions[4]; +typedef void (*normfunc)(const void *, void *, unsigned); +extern const normfunc normfunctions[4];
/***************************************************************************** * IDirectSoundDevice implementation structure